Ihaven't had a period in 3months
& Im On Birth Control Ive Been Having Unprotected Sex
But itook A pregnancy test About 2months ago it came out negative
So idont know what it is.

You should ask you ob/gyn if that is a side effect of the birth control... it has that effect on some people.. especially the depo shot.. I have known people to not have a period or just spotting.. I personally have tried the ring and didn't have a period on that either.. so just varies from woman to woman..

What kind of birth control are you on?

Why not try taking another pregnancy test in the morning to put your mind at ease.

Ive Been Dizzy &Tired My Mom Thinks Im Pregnant Im Only 17
At times ifeel full & Like 10 20 minuets later ifeel hungry
& I've Gained wieght too I don't know iwent from a size 1 too a 3
& I also been getting heartburn ughhh Idk ? What it is

And I'm on the depo

I could be wrong but that sounds like possible side effects of depo... and I agree with j9 why not take another pregnancy test and see that's the easiest way to alleviate this worry..

Many women gain weight on depo. Also, many women do not get periods on it.

Take another HPT to put your mind at ease. Make sure you use first morning urine to get the most accurate result.